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2 SheetsSheet 1.

( No Model.)

J. MILLER.

ORE GONGENTRATGR.

Patented Nov. 27

WETNEEEES 2 Sheets- Sheet 2. J. MILLER. A

ORB GONGENTRATOR,

Patented Nov. 27, 1883.

(No Model.)

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WlTNEEEEE I'llllllllll FFIQEQ JONATHAN ll'IlLLER, OF CONCORD, NEW HAMPSHIRE.

MORE-CONCEYNTRATOR.

SPECIFICATION forming part of Letters Patent No. 289,018, dated November 2'7, 1883. Application filed April 5, 1883. (No model.)

To all whom it may concern:

Be it known that I, JONATHAN llrIILL'ER, a citizen of the United States, residing at Concord, in the county of Merrimack and State of New Hampshire, have invented certain Improvements in Ore-Concentrators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which Figure 1 is a perspective View of an ore-concentrator constructed in accordance with my invention. Fig. 2 is a longitudinal vertical section through the center of the same. Fig. 3 is a horizontal section through the springs, which actuate the ore-pan in one direction, and parts adjacent thereto. Fig. 4 is a side elevation of a portion of the ore-pan. Fig. 5 is a plan of a portion of the ore-pan, the overhanging plate at the end of the pan being removed.

My invention has for its object to provide a means by which metals may be separated from the rock or sand in a. practical and economical manner without being compelled to size or grade the metals and rock, sand, or what ever gangue they may be associated with.

In order to build a practical machine for the purpose as aforesaid, it becomes necessary to observe and understand the law of inertia when connected with a device whereby a blow or concussion is produced. Under such .law it will be found that when two bodies having equal bearing-surfaces, but of different gravity, are placed upon a table or pan capable of unobstructed movement, if a bl ow is produced against the table or pan, the heavier body will move toward the point where the blow is given faster than the other or lighter body, and upon this fact is based the whole law of practical concentration of ores.

My invention consists in an ore pan or receptacle so hung or supported as to be movable in the direction of its length, and adapted to be actuated in one direction-by a cam or equivalent device, and in the opposite direction, to produce the blow or concussion, by a spring or springs, which are so arranged and applied as to follow the forward movement of the pan for a portion only of its stroke, where by the heavier particles of the pulverized ore are caused to advance toward the point where the blow is given, thus rapidly separating the metal from the rock or sand, as required, the metal being discharged through a suitable aperture in the pan, and the rock or sand being washed away by water allowed to fall thereon; and my invention also consists in certain de tails of construction and combinations of parts, as hereinafter set forth and specifically claimed.

In the said drawings, A represents the frame of the concentrator, consisting of four vertical posts, a, rising from a base, B, and connected together at the ends by transverse rods 6 and longitudinal top rails, c.

D is the ore pan or receptacle, of the form seen in Fig. 1, one end of which is supported by a rod, d, secured thereto and sliding through a rock-shaft or axle, e, which has its bearings in two of the posts a, at one end of the frame. The outer end of this rod (1 slides in a guide, f, which is attached to a cross-head, g, having attached to its opposite ends two flanged pis-. tons, h, Fig. 3, which fit within cylinders i, secured to the axle e, and are encircled by spiral springs k, arranged between the flanges of the pistons and the heads of the cylinders. The front or opposite end of the ore-pan D is suspended from a rod, 2, resting on the rails c, by means of a vertical rod, m, the lower end of which is secured to a transverse rockshaft, 12, attached at its ends to the pan by means of sockets or boxes p, two vertical guide-rods, g, secured to the rock-shaft n, and adapted to slide through the rod Z, being provided to steady the pan during its movements. The upper end of the rod on is provided with a screw'thread, over which, above the rod Z, is a screw-nut, 1*, provided with. a handle, 8, by turning which the front end of the pan can be raisedor lowered to adjust it to the desired angle.

In suitable uprights, G, rising from opposite sides of the base B, is supported the driving-shaft H, provided at one end with fast and loose pulleys to, and adapted to be driven by a belt (not shown) from any suitable power. This shaft H is provided at or near its center with a cam or wiper wheel, I, which acts upon a stiff spring, a, secured to a projection, 14, on the under side of the pan D, and thusas the ICO cam revolves each of its projections in turn forces back'the pan against the resistance of the springs 76 until the said projection passes out of contact with the spring 1), when the springs It will instantly throw forward the pan D and cause its end 12 to be suddenly brought into contact with a block or buffer, K, of wood or other suitable material, secured to the transverse rods b at one end of the frame A, a blow or concussion being thus produced, for a purpose to be hereinafter described. To the under side of the pan D, and extending longitudinally and centrally from one end to the other, is secured a stiffening-bar, a, which serves to strengthen the pan and enable it to withstand without injury the shocks or concussions to which ,it is subjected, thereby enabling the pan to be made of much lighter material than would otherwise be required, and consequently much cheaper, and requiring a lighter blow for a given amount of work, as the force of the blow is governed by the weight of the pan.

b b are two guide-rods, which project out from one end of the pan and rest upon the axle I 6, serving to steady the pan and assist in preventing it from rocking.

c c, are two perforated inlet-pipes secured withilrthe pan, which is provided on its 1111-] der side with couplings for connection with hose, whereby a suitable supply of water can be introduced and mixed with the pulverized ore in the pan.

(1 is an aperture at the front of the pan, through which'the metal is discharged after being separated from the rock or sand, and c is an aperture at the opposite end of the pan, which is connected with a pipe, f, Fig. 4,. through which the rock or sand isdischarged. The rear end of the pan, near the point of discharge e for the gangue, is provided with a rigid projecting or overhanging plate, 9, arranged at right angles with the line of dis charge, which prevents the water from being thrown out of the pan by the concussion, and also tends to throw back floating metal and slimes. At the front end of the pan is a ledge or guard, h, which retains the metal within the pan and prevents it from passing out to and over the front edge thereof.

Within the pan D is arranged a series of laminae or overlapping plates or strips, 2', of metal or other suitable material, soldered or otherwise secured to the bottom of the pan,

and extending transversely or across the same at right angles with the direction of motion of the ore toward its point of discharge, a series of minute square edges or shoulders, 15, being thus presented, together with a series of surfaces, 16, each extending from the bottom of one shoulder to the top of the next one in front, by which construction, as the heavier particles of the ore are caused by the blow or eoncussion upon the pan to settle toward its. bottom and advance toward the discharge-aperture d, they are caught by the shoulders or projecting edges 15 of the plates, and thereby prevented fromhaving any backward motion, while these plates 2" also cause the pulp or gangue, as it is fed into the pan from any desirable hopper, (not here shown,) or it may be thrown in with a shovel, to pass more directly to its bottom, where the ore is jarred, leaving the sand at the top of the mass to be washed back and discharged by the water through the aperture 6 and pipe f, the metal, as it is heavier than the sand, readily passing to the bottom of the pan as the latter is jarred by the concussion caused by the blow. 'By providing the projection 14 with a spring, 1;, arranged, as shown, for the cam I to act upon, the too abrupt release of the pan is avoided, which prevents the springs is from too suddenly changing the directionof motion of the pan,

duce a. concussion in the wrong direction and cause the metallic or heavier particles of the The ends of the an 1 are 'preferablyprov'ided:

with friction-rolls 17, which rest on the rails which would be objectionable, as it would pro,

c, and by thus supporting the front end of the pan D from a rod which merely rests on the rails a, and is free to move thereon in the direction of the length of the pan, it will be seen that the rod Z will be free to move backward and forward upon the' rails c, which forma level track and guide therefor as the pan is reciprocated, thus preventing this end of the pan frombeing raised or lowered to any appreciable extent during its movements, as would occur if the rod 1 were .only capable of turning upon its axis, and which would be obquired to operate the machine. Furthermore, by this device the pan may be placed at any de,

,jectionable, as it would increase the power resired angle necessary in working different ores without changing the position of thetrack or guide rails c, or requiring any change in the power of the springs k.

The surface 20 of the concussion-block K, next the front end of the pan D, is made con- "IIo cave, being curved in the arc of a circle hav ing its center at the axle e, on which the pan is pivoted, whereby a square and even blow' of the end 12 of the pan upon the block is in-' sured and the length of the stroke of the pair allowed toremain unchanged as it is raised' or lowered by means of the adj ustingscrewnut 0'.

On reference to Fig. 3 it will be seen that there is a space, 18, between the end of the rod d and the end of the guide fwhen the springs have forced the latter forward as far as possible, and by thus causing the springs k to follow the pan for a portion only instead of. throughout the entire length of its forward" stroke the actual concussion is produced at the front end of the pan, as is necessary. to

cause the metallicparticles to move in the right direction, or toward the discharge-apr'.

erture d, whereas if the springs is were to follow the pan throughout the entire length of its stroke the concussion would in reality be at the rear end of the pan, which would cause the metallic particles to travel in the wrong direction. It will be seen that the point of discharge, d, for the metal is in a direct line with the point of concussion, whereby all difficulties heretofore experienced in obtaining a free and rapid discharge are avoided, while this construction also greatly increases the power of the blow to concentrate the ore.

The rear end of the bottom of the pan D is inclined upward, as seen in Fig. 2, toward the aperture e,where the rock and sand are dis charged, which construction tends to prevent any particles of metal from being easily washed out with the sand.

At the rear end of the pan D is placed a float, L, Figs. 2 and 5, consisting of a piece of board of proper dimensions, which, if desired, may be covered with felt, gunny-cloth, or any other textile or fibrous material, the float being connected on one side with the pan D by means of wire loops 2-1, or other suitable fastenings. v

When the concentrator is in operation, the water,which is suiflcientto carry away the rock and sand, will cause the float to rideup on it, and as it is placed near the point of discharge, e, for the gangue it will cat-ch and retain any slimes or floating metal that may be moving upon the water.

What I claim as my invention and desire to secure by Letters Patent, is-

1. In an ore-concentrator, the pan D, provided withaseries of laminae or overlappingplates, 11, and having a discharge-opening for the concentrates in a line with the point of concussion, in combination with a buffer, K, an adjustable support or axle, and suitable means for producing the concussion, substantially as set fort 2. In an ore-concentrator, the combination, withthe frame A, of the ore-pan D, an axle or rock-shaft, c, a rod, (1, sliding through said axle, rock-shaft a, rod Z, the rails c, a screwrod, m, adjusting-nut 0-, the guide-rods g, attached to the rock-shaft n and sliding through rod Z, the cam I, springs k, and the concussion block or buffer K, all constructed to operate substantially as set forth.

In an ore-concentrator, the combination, with the ore-pan D and the rod 1, of the rod (1, secured to the end of the pan, the rockshaft 0, the cylinders 6, attached to the shaft 0, their flanged pistons h, springs k, the crosshead g, and the guide f for the rod (1, arranged to have a space, 18, between the end of the rod and the guide when the springs k have completed their movement, all constructed to operate substantially as set forth.

4:. The pan D, having its discharge-opening at for the concentrates in a line with the point of concussion, and a series of thin laminae, c", with overlapping edges forming its working bottom, substantially as herein de scribed, for the purpose set forth.

5. In an ore-concentrator, the pan D, constructed as described, and provided with the yielding contact-point 14 o, in combination with the actuating-cam I, as set forth.

6. In an ore-concentrator, the combination, with the reciprocating ore-pan D and the axle c, capable of adjustment in the arc of a circle, of the concussion block or buffer K, having its surface 20 curved in the arc of a circle concentric to that described by the front end of the pan when raised or lowered, substantially as and for the purpose described.

7. In an ore-concentrator, the combination, with the ore-pan D, constructed as described, and having discharge-outlet e, of the float L, arranged in close proximity with the said dis charge-outlet c, for the purpose of catching the slimes or light metallic particles floating upon the water in the pan, substantially as set forth.

8. In combinationwith an ore-concentrating pan, the supporting devices for the rear end thereof, consisting of rod (1, axle c, posts a, guide f, cross-head having attached to its opposite ends two flanged pistons, h, cylinders c '5, secured to axle c, and springs 7:, substantially as set forth.

9. The ore-pan D, in combination with rails 0, rod Z, transverse rock-shaft a, sockets or boxes 1;,vcrtical guide-rods g, sliding through rod Z, vertical rod 'm, provided with a screwthread, and nutr, all arranged to operate substantially as described.

\Vitness my hand this 2d day of April, A. D. 1883.

I. E. TESCHEMACHER, XV. .T. CAMBRIDGE. 

